iniphile.spec.in: tarball is now gzipped

i use bs-update which supports only gzip ATM.
iniphile.spec.in: gcc-c++ in BuildRequires

fixes an OpenSUSE / SLE build failure.
mk/common-values.mk: VERSION_minor is 5
iniphile.spec.in: owns up to /usr/include/iniphile
mk/common-unix.mk: install -m 0644 for header files

plus a fix for spurious change in VERSION_minor.
mk/common-unix.mk: libs are installed non-executable
iniphile.spec.in: %description has some content
iniphile.spec.in: subpackages to placate the OBS

the OpenSUSE Build Service requires development files
to be packages separately.
iniphile.spec.in: works with /usr/lib64

LIBDIR=%{_libdir} fixes the wrong default on 64-bit Linuxes.
iniphile.spec.in: Summary, Group tags for subpackages

plus a bad copy&paste in subpackage names.
iniphile.spec.in: subpackages need %description tags
iniphile.spec.in: subpackage %descriptions fixed
iniphile.spec: subpackage %files, %pre, %postun fixes
iniphile.spec.in: libiniphile-devel BuildRequires: pkg-config
iniphile.spec.in: libiniphile.so.0 packaged as libiniphile0

the OBS demands so (for OpenSUSE).
iniphile.spec.in: libiniphile-devel Requires: libiniphile0
mk/common-unix.mk installs gzipped manpage
specfile: libiniphile-devel's dep on libiniphile0 versioned

otherwise bad things will happen on upgrade.
Revert "mk/common-unix.mk: libs are installed non-executable"

This reverts commit 3658324b8ab401863cdda7b758589748bf78b5a8.

non-executable shared lib broke automatic dependencies in Fedora.
this manifested itself in packaging logdemux:

  "nothing provides libiniphile.so.0 needed by libiniphile-devel"

http://en.opensuse.org/openSUSE:Shared_library_packaging_policy says

  Shared libraries are normally not standalone runnable
  (exception: libc.so.6 and ld-linux.so.2). But they often
  have the +x bit set!

which, while correct, is far from the whole truth.

freenode/#opensuse-buildservice:

  2013-06-06 23:29:37 < vad> elfdeps only works on executable files.
                             Some stupid packages generate shared
                             libraries without the required x bit